Printing press



y 1929- c. H. cocHRANE I 1,711,489

PRINTING PRESS Filed July 1'7, 1924 2 Sheets-Sheet 2 @J' INVEVTOR.

Arron ys,

Patented May 7, 1929.

UNITEDSTATES,

I muses PATENT or fice;v

" CHARLES H. COGHRANE, OF CHICAGOJILLINOIS.

' PRINTING PRESS.

Application filed July 17,

of a platen operating to press the-sheet against the type form. y

The principal object that is sought to b'e attained is that of acceleration of the printing operation without undue jar or. strain.

vOne of the objects of the invention is to so organize the press that, the necessary elementary movements will "be, minimized as far as possible, both in the operation of inking the type, and also that of delivering the paper to be printed upon beforea platen and withdrawing the same after printing;-

all looking to increased speed vand consequently greater production, without certaln undue strains which have been heretofore found in presses of this general nature.

A. preliminary description of the device as illustrated in the drawings and more fully described in detail isaszfollows. A type form is suitably mounted withina circum ferential drum, the typeface coming to the surface of a flattened segment of the drum. The periphery of the drum is employed as a guide for oppositely disposed sets of ink rolls, which are suitably and oppositely mounted on radial arms, with means to retate said arms'so as to cause the rolls to traverse the path of the circumference of theB drum and also the face of the type form.

same, I am able to traverse the face of the type form with every semi-revolution of the roller-carriage. tor, for ithas been foundthat if only one set of ink rolls is provided, the movement of said rolls at a speed suiiicient to traverse the ink faces once in every revolution will cause such a violent vibration in the Another platen embodying the soft yielding impression blanket or surface under the tympan. This reduces theimpressionai force necessary and so reduces the strain onthe machine. I v

Another important phase of the invention lies in the fact that I "provide means by which the sheet to be printed upon is taken from a platform placed in very close proxdelivered toa discharge receptacle.

providing said oppositely disposed rolls with suitable inking means for the This is an important fac 1924. Serial" no. mans.-

imity to the place ofimpression, and

iivered by-a limited arcuate movement into I a position before the type and between-the type and the platen,-.and at the same-time and by reason of" the same arcuate movement I pick up a sheet from apile and deliver the same on to a platform from which such sheet may be again picked up and delivered as stated. FurthermorejI provide means by which, when the printing is done,

the sheet may be withdrawn downwards and The picking up of the sheets and the withdrawal of the same is done by the medium of a vacuum. Aspreviously stated, the purposeof my invention is to provide "means by which the sheets of paper to be printed maybe, picked up at a point relatively near the space lying between the platen and the type, and carried to a printing position, and withdrawn therefrom after the printing operation, without oneoperation delaying the other. as is now usual. At the jsametime thatthe sheet is being delivered between the platen and the type, I aick up another sheet and place it on a plat 'orm where it canbe. again picked up and delivered A more detailed description of; myinvention is shown in the following drawings; wherein the several parts of themechanism are indicated by numerals, like parts being designated by like numerals. As the machine is symmetrical "about the center line A-.A I have shown only one side in the plan view. Parts in the side not shown are designated by the letter a followingthe numeral by which the cOrrespOndingpart shown is indicated; forexample, 29 indicatesfthe- I connecting rod shown, whereas 29 indicates a corresponding part on the side not shown. Fig. -1 is a side elevation of the press showing in full lines the platen in the open. position and in dotted linesthe platen in the closed position i u Fig. 2 is a half plan view, both sides be ing symmetrical; v i f Fig. 3 is a section ofthe bed anddrumon the center line A A; A

Fig. 4 is- .a side elevation platen in the closed position. in full lines and in the open position in dotted lines; and] Fig. 5 ,is a side elevation detail of the platen.

' Thetype bed '1 is stationaryand is fixed on the hollow shaft2 between the spaced side frames 3 and 3 of the press frame; The

showing the shaft 2. extends transversely between the sideframes 3 and 3. and has its ends secured thereon, and'is counterbalanced by the weight 4:. A pair'of duplicate double form roller carriages 5 and 5 are rotatably mounted on the shaft 2 on the inside of and adjacent respective side frames 3 and 3 the type bed 1 being disposed between these roller carriages. Two duplicate gears 6 and 6 surround the shaft 2 for rotation with respect thereto and are disposed between respective roller carriages 5 and 5 and side frames 3 and 3 and are secured with re spective roller carriages 5 and 5 for driving the same. The power shaft 23 extends transversely across between the side frames 3 and 3* out of the path of rotation of the roller carriages 5 and 5 and is mounted for rotation in the side frames. this shaft constituting the drive shaft of the press and being driven from a suitable source of power not shown. The roller carriages 5 and 5 are driven from the shaft 23 in synchronism and in angular alinement by means of duplicate idler spur gears 7 and 7 disposed on the insides of and adjacent respective frames 3 and 3 and mounted for rotation thereon and meshing with respective spur gears 6 and 6? and duplicate spur gears 8 and 8 secured on the shaft 23 and disposed on the insides of and adjacent respective frames 3 and 3 and meshing with respective gears 7 and 7 Inkrollers 9 and rider rollers 10 are carried at the diainetrically opposite ends of the roller carriages 5 and 5 and extend transversely therebetween, springs 12 yieldably urging the.

rollers inwardly with the axles ofthe rollers engaged inradial sl0ts13 in the roller car riages. In the rotation ,of the roller carriages the rollers 9 bear on bearers 11 and 11 and pass entirely around the type bed 1, the shaft 23 being disposed out of the path of the ink rollers 9 and 10 as well as thatof the roller carriages.

An ink fountain of usual construction,

not shown, supplies ink to the ink cylinder 1e extending transversely across between and rotatably mounted on the side frames 3 and 3 The ink roller 15 is mounted on arms 16 and 16 pivoted on. respective side frames 3 and 3, and cranks 17 and 17, ro-

tatably mounted on respective side frames,-

plate 20, disposed between the bearers 11 and 11 in concentric relation with the roller carriages 5 and 5 for the transfer of ink from the cylinder l lto the segmentplate 20. The operation of the roller 15 is so timed that it engages the plate 20 between I thetwo sets ofink rollers 9 and does not interfere with their rotation. The ink rollers 'is another gear 24:, and this gear meshes with an idler gear 25 mounted on the out side of the ad acent side frame, and the gear 25 meshes with a crank gear 26 secured on a revoluble shaft 28 extending transversely through the bore of the shaft 2 whereby the shaft28 is driven in timed relation with the roller carriages 5 and 5 the shaft 28 making two revolutions to one revolution of the roller carriages. Secured on the shaft 28 on the outside of the other side frame is a crank 27, and connecting rods 29 and 29 are pivotally secured respectively with the crank gear 26 and the crank 27 and a transverse shaft 31 secured to the platen for reciprocating the platen. The platen is pivotally mounted by means of transversely spaced arms 32 and 32 extending downwardly and journaled' upon a transverse shaft"33 extending between the side frames 3 and 3 and mounted thereon, A spring 34 imparts a' reaction thrust to the platen at the outer reversal thereof.

' The nippers 35 and 35 mounted on the swinging frame 36, which is reciprocated by the crank 66 and the connecting rod 67, enter the press-jaw from above. Theyare connected by the suction cross bars '37 and 38,.which' are perforated and connected by the flexible tubing 39 and 10 to the vacuum pump 55. I-Iorizontal movement of the nippers when in the closed position is allowed for by the sliding head 41. 42 is a platform fitted with guide 43 which isoperated by lever, 44. j

The suction gripping arms 45 and 415 for withdrawal of he sheet are joined by the suction cross bar 46 which is perforated and connected by the flexible tubing 17 to the vacuum .pump 55. The arms 15 and 15 pivoted-on arms 18 and 48 which are fixed to rocker arms 32 and 32, are oscillated by the crank 49 and connecting rod 50. Grank 49 is rotated by a suitable train'of gears as 65. 51 is the delivery slide for the printed sheets. The perforated pipes 52 are connected by the flexible'tubing 53 with the pressure pump .55. 54 is a well-known type of heater. The combined vacuum and pressure pump 55 is connected through valves (not shown) with the suction tubing 39, 40 and 17, and with thepressure tubing 53.

These valves are timed by a suitable mechanism to open at the proper time.

Fig. 3' is a detail of the bed showing the type form 21 fixed within the chase 22 on the bed 1. The ink rollers 9 are aboutto ink the type form, while the opposite set of ink rollers are about to come in contact with the segment ink plate 20. I

Fig. 4 showsthe platen SO'inthc closed position with nippers 85 and holding at) the sheet against the platen. The suction gripping arms and 45 are in position to iron base which .is seeuredto the platen,

by the points 61 and the catchGQf' 63 is the pile of blank paper. Get is the pile of printed sheets on the delivery truck.

he operation of the press is as follows:

The type form 21 is secured within the chase 22 on the bed plate 1..

Ink is delivered by the ink roller 15 from the ink cylinder 14 to the segment ink plate 20. The ink is picked up from the segment ink plate 20 by the ink rollers 9 and transferred to the type form 21. The springs 12 pull these rollers in against the bearer rail 11, segment ink-plate 20 and the type form The paper is fed in two movements by the nippers35 and The first swing of the frame 36 brings asheet from the pile 63 to the table 42 by means of the suction cross bar 38. l is maintained at the proper level by a screw elevating mechanism not shown. In the nextswing the suction cross bar 3? picks the SAGGt from the platform 42, the guide 413 having been lowered by the lever ii, and delivers the same between the jaws formed by the type form and the p ;en. When the platen 30 is about one inch from the type form, t e sheet is gripped between the nippcrs ltcn 80. Theremaining inch of travel is provided for by the sliding head At the same time that the suction cross-bar 37 is carr ing the sheet itno the printing position, the suction cross bar 39 is bringing a second sheet from the pile 63 to the table l2. After printing, the platen recedes and the suction cross bar ib jerks the sheet down and deposits it on the slide 51, from which it goes to the delivery pile 6% on the truck. The blowing pipes 52 expedite the delivery. The sheet passes under the flame from the heater 5% whereby The pile of blank paper 63 any charge of static electricity is removed and the drying of the ink hastened.

Claims:

1. In a v printing press the combination with spaced side frames, of a. hollowfsupport extending transversely between said.

side frames and secured therewith, a typ bed and an ink plate carried by said support between said side 1' ames and arranged angular-1y about said support, a reciprocable platen cooperating with 'saidgtype bed, a

pair ofroller carriages disposed between respective side frames and said type bed and ink plate and mounted for rotation aboutsa-id support, ink rollers extending between and carried by said-roller carriages for con tact with said ink plate and a printing form on said type bed, a transverse drive shaft carried by and extending across between said side frames out of the path of said roller carriages and ink rollers, a pair of gear trains disposed on the outsides of respective roller carriages for driving said rollercarriages in synchronism from said drive shaft, av crank shaft extending transversely and through said hollew support, cranks on said crank shafton the out-sides of respective side frames for reciprocating said platen, and a third gear train for driving said crank shaft from said drive shaft in timed relaport between said side frames and arranged angularly about said support, a reciproca-v bie platen cooperating with said type bed,

pair of double roller carriages disposed between respective side frames and said ty 3e bed and ink plate and mounted for rotation about said support, two sets of ink rollers extending between and carried bysaid roller carriages at diametrically opposite ends of the roller carriages for contact with said ink plate and a printing form on said type bed, a transverse drive shaft carried by and extending across between said side frames out of the'path of said roller carriages and ink rollers, a pair of spur gear trains disposed in respective planesbetween said side frames ant acent roller carriages for driving said roller carriages in synchronism from said drive shaft, a crank shaft extending; transversely and through said hollow sup port, cranks on said crank shaft on the outsides of respective side frames for reciprocating said platen, and a third'spur gearcrank shaft to'one revolution of said roller carriages.

8. In a printing press the combination with spaced side frames, a type bed and ink plate disposed between said side frames and arranged angularly about a transverse axis, support means extending on said axis inwardly from said side frames for supporting said bed and ink-plate therefrom, a reciprocable platen cooperat-ing'with said type bed, a pair of roller carriages disposed between respective side frames and said type bed and ink plate and mounted for rotation on said axis about said support means, ink rollers extending between and carried by said roller carriages for contact Witn said ink plate and a printing form on said type 1 bed a nair of coaxial revoluble cranks dis- 7 l posed on the outsides of respectivev of said side frames for reciprocating said platen, and means for rotating said carriages and cranks in synchronism.

4. In a printing press'tlie combination itlrspaced side frames, a type bed and ink plate disposed betweensaid side frames and arranged angularly about a transverse axis, support means extending on said axis inwardly from said side frames for supporting said bed and ink plate therefrom, a reciprocable platen cooperating with, said type bed, a pair of roller carriages disposed bctween respective side frames and said type bed and ink plate and mounted for rotation on said axis about said support means, ink rollers extending between and carried by said roller carriages for contact With said inkplate and a printing form on said type bed, a pair of revoluble cranks disposed on said axis and on the outsides of respective of said side frames, and means to rotating said carriages and cranks in synchronisrn.

Signed by me at Springfield, Ohio, this 12th day of July, 192

' CHARLES H. CUCHRANE. 

